New Delhi/IBNS: Russian ambassador to India Denis Alipov has expressed condolences over the demise of former Indian prime minister Manmohan Singh.

Alipov wrote on X, "It is a moment of poignant sorrow and grief for India and for Russia. Dr Manmohan Singh‘s contribution to our bilateral ties was immeasurable.

"His suave demeanor was always endearing as unquestionable was his expertise as an economist and his commitment to the progress of India. Our thoughts and prayers are with the family of Dr Manmohan Singh ji and the Indian people."

Singh, who was one of the longest serving Indian PMs, died at the age 92 on Thursday.

The Congress veteran, who was architect of India's economic liberation in the 1990s, was instrumental in maintaining peace talks with hostile neighbour Pakistan during his term which ran from 2004 to 2014.

Manmohan Singh rose to prominence as the country's finance minister during the Congress regime headed by PV Narasimha Rao during 1991-96, for bringing sweeping reforms that transformed the economy.

He retired from the Rajya Sabha in April 2024.

The Indian government on Friday announced the country will observe a state mourning for seven days  from 26.12.2024 to 01.01.2025.

"During this period the National flag will be flown at half-mast throughout India where it is regularly flown and there will be no official entertainment during the period of state mourning. It has also been decided that the state funeral will be accorded to late Dr. Manmohan Singh," the Indian government said in a statement.

In the same period, the National flag shall also fly half-mast on the day of funeral in all Indian Missions or High Commissions of India abroad.